Unmanned aircraft



FIG. 1 is a top plan view of an unmanned aircraft;

FIG. 2 is a side elevational view of the unmanned aircraft;

FIG. 3 is another side elevational view of the unmanned aircraft;

FIG. 4 is a bottom plan view of the unmanned aircraft;

FIG. 5 is a front elevational view of the unmanned aircraft;

FIG. 6 is a top perspective view of the unmanned aircraft;

FIG. 7 is a bottom perspective view of the unmanned aircraft; and,

FIG. 8 is a bottom perspective view of the unmanned aircraft showing the landing gear in a down position.

The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to portions of the unmanned aircraft and form no part thereof. 

CLAIM The ornamental design for an unmanned aircraft, as shown and described. 